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sprinkler system check valve

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In Prince Georges County MD there is a requirement by local code to replace the sprinkler system check valve every 5 years. Aside from local codes, are you aware of any maintenance or replacement requirements required by national code or manufacturers of these valves?

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That?s a residential dual check back flow assembly. They are considered minimal protection. Here in Charleston the water company requires these at every water meter. You cannot test them, there?s not any maintenance that?s required other than freeze protection and they don?t ever get replaced unless the meter is replaced. I?d find the manufacture name and model number and give them a call tomorrow and ask how long they last.

If that sprinkler uses any type of chemical I?d hope they have more than just that dual check. Around here a RP backflow assembly is required on all fire sprinkler systems.

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